Be aware that the update in the Microsoft Download Center applies to the Microsoft Installer (.msi)-based edition of Office 2013. It doesn't apply to the Office 2013 Click-to-Run editions, such as Microsoft Office 365 Home (see Determining your Office version).

Improvements and fixes

This security update contains improvements and fixes for the following nonsecurity issues:

After update KB 3118388 is applied, Office documents in the Public Folders are unexpectedly opened in the Protected View.

A "Blocked external content" warning for Secure/Multipurpose Internet Mail Extensions (S/MIME) email messages that have no external content is displayed in Outlook 2013.

This update adds support for directly importing .ics files that contain HTML bodies into an Outlook 2013 calendar. You no longer need to first convert the HTML body to Rich Text Format (RTF).

Mail delivery rules stop working. When you try to open the Manage Rules and Alerts dialog box, you receive the following error message:

The operation failed because of a registry or installation problem. Restart Outlook and try again. If the problem persists, reinstall.

How to get and install the update

Method 1: Microsoft Update

This update is available through Windows Update. When you turn on automatic updating, this update will be downloaded and installed automatically. For more information about how to turn on automatic updating, see Windows Update: FAQ.

File information

The English (United States) version of this software update installs files that have the attributes that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). The dates and times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and times may change when you perform certain operations on the files.